diff --git a/edgecenter/data_source_edgecenter_securitygroup.go b/edgecenter/data_source_edgecenter_securitygroup.go
index daf585c5..47ee12d2 100644
--- a/edgecenter/data_source_edgecenter_securitygroup.go
+++ b/edgecenter/data_source_edgecenter_securitygroup.go
@@ -223,11 +223,12 @@ func dataSourceSecurityGroupRead(_ context.Context, d *schema.ResourceData, m in
 			r["protocol"] = sgr.Protocol.String()
 		}
 
-		r["port_range_max"] = 0
+		r["port_range_max"] = 65535
 		if sgr.PortRangeMax != nil {
 			r["port_range_max"] = *sgr.PortRangeMax
 		}
-		r["port_range_min"] = 0
+
+		r["port_range_min"] = 1
 		if sgr.PortRangeMin != nil {
 			r["port_range_min"] = *sgr.PortRangeMin
 		}
diff --git a/edgecenter/resource_edgecenter_securitygroup.go b/edgecenter/resource_edgecenter_securitygroup.go
index fced88d7..6c73156e 100644
--- a/edgecenter/resource_edgecenter_securitygroup.go
+++ b/edgecenter/resource_edgecenter_securitygroup.go
@@ -10,6 +10,7 @@ import (
 	"github.com/hashicorp/go-cty/cty"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/diag"
 	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/validation"
 
 	"github.com/Edge-Center/edgecentercloud-go/edgecenter/securitygroup/v1/securitygrouprules"
 	"github.com/Edge-Center/edgecentercloud-go/edgecenter/securitygroup/v1/securitygroups"
@@ -149,16 +150,16 @@ func resourceSecurityGroup() *schema.Resource {
 							Description: fmt.Sprintf("Available value is %s", strings.Join(types.Protocol("").StringList(), ",")),
 						},
 						"port_range_min": {
-							Type:             schema.TypeInt,
-							Optional:         true,
-							Default:          0,
-							ValidateDiagFunc: validatePortRange,
+							Type:         schema.TypeInt,
+							Optional:     true,
+							Default:      1,
+							ValidateFunc: validation.IntBetween(1, 65535),
 						},
 						"port_range_max": {
-							Type:             schema.TypeInt,
-							Optional:         true,
-							Default:          0,
-							ValidateDiagFunc: validatePortRange,
+							Type:         schema.TypeInt,
+							Optional:     true,
+							Default:      65535,
+							ValidateFunc: validation.IntBetween(1, 65535),
 						},
 						"description": {
 							Type:     schema.TypeString,
@@ -221,8 +222,6 @@ func resourceSecurityGroupCreate(ctx context.Context, d *schema.ResourceData, m
 	for i, r := range rawRules {
 		rule := r.(map[string]interface{})
 
-		portRangeMax := rule["port_range_max"].(int)
-		portRangeMin := rule["port_range_min"].(int)
 		descr := rule["description"].(string)
 		remoteIPPrefix := rule["remote_ip_prefix"].(string)
 
@@ -237,11 +236,16 @@ func resourceSecurityGroupCreate(ctx context.Context, d *schema.ResourceData, m
 			sgrOpts.RemoteIPPrefix = &remoteIPPrefix
 		}
 
-		if portRangeMax != 0 && portRangeMin != 0 {
-			sgrOpts.PortRangeMax = &portRangeMax
-			sgrOpts.PortRangeMin = &portRangeMin
+		portRangeMin := rule["port_range_min"].(int)
+		portRangeMax := rule["port_range_max"].(int)
+
+		if portRangeMin > portRangeMax {
+			return diag.FromErr(fmt.Errorf("value of the port_range_min cannot be greater than port_range_max"))
 		}
 
+		sgrOpts.PortRangeMax = &portRangeMax
+		sgrOpts.PortRangeMin = &portRangeMin
+
 		rules[i] = sgrOpts
 	}
 
@@ -332,11 +336,11 @@ func resourceSecurityGroupRead(_ context.Context, d *schema.ResourceData, m inte
 			r["protocol"] = sgr.Protocol.String()
 		}
 
-		r["port_range_max"] = 0
+		r["port_range_max"] = 65535
 		if sgr.PortRangeMax != nil {
 			r["port_range_max"] = *sgr.PortRangeMax
 		}
-		r["port_range_min"] = 0
+		r["port_range_min"] = 1
 		if sgr.PortRangeMin != nil {
 			r["port_range_min"] = *sgr.PortRangeMin
 		}
diff --git a/edgecenter/test/.env b/edgecenter/test/.env
index f3aa4157..fb0a07e5 100644
--- a/edgecenter/test/.env
+++ b/edgecenter/test/.env
@@ -6,6 +6,6 @@ EC_PASSWORD=Test-1234
 EC_PLATFORM=https://api.edgecenter.online/iam
 EC_STORAGE_API=https://api.edgecenter.online/storage
 EC_USERNAME=test-cloud-common@edgecenter.ru
-TEST_PROJECT_ID=8272
+TEST_PROJECT_ID=31203
 TEST_REGION_ID=8
 
diff --git a/edgecenter/utils_securitygroup.go b/edgecenter/utils_securitygroup.go
index c670d9f4..9530acd3 100644
--- a/edgecenter/utils_securitygroup.go
+++ b/edgecenter/utils_securitygroup.go
@@ -6,18 +6,10 @@ import (
 	"io"
 	"strconv"
 
-	"github.com/hashicorp/go-cty/cty"
-	"github.com/hashicorp/terraform-plugin-sdk/v2/diag"
-
 	"github.com/Edge-Center/edgecentercloud-go/edgecenter/securitygroup/v1/securitygroups"
 	typesSG "github.com/Edge-Center/edgecentercloud-go/edgecenter/securitygroup/v1/types"
 )
 
-const (
-	minPort = 0
-	maxPort = 65535
-)
-
 // secGroupUniqueID generates a unique ID for a security group rule using its properties.
 func secGroupUniqueID(i interface{}) int {
 	e := i.(map[string]interface{})
@@ -35,15 +27,6 @@ func secGroupUniqueID(i interface{}) int {
 	return int(binary.BigEndian.Uint64(h.Sum(nil)))
 }
 
-// validatePortRange checks if the provided port value is within the valid range.
-func validatePortRange(v interface{}, _ cty.Path) diag.Diagnostics {
-	val := v.(int)
-	if val >= minPort && val <= maxPort {
-		return nil
-	}
-	return diag.Errorf("available range %d-%d", minPort, maxPort)
-}
-
 // extractSecurityGroupRuleMap creates a security group rule from the provided map and security group ID.
 func extractSecurityGroupRuleMap(r interface{}, gid string) securitygroups.CreateSecurityGroupRuleOpts {
 	rule := r.(map[string]interface{})